Evaluation of three wheat (Triticum aestivum L.) cultivars as sensitive Cd biomarkers during the seedling stage
Open Access
- 27 January 2020
- Vol. 8, e8478
- https://doi.org/10.7717/peerj.8478
Abstract
Sensitive seedling crops have been developed to monitor Cadmium (Cd) contamination in agricultural soil. In the present study, 18 parameters involving growth conditions and physiological performances were assessed to evaluate Cd-responses of three wheat (Triticum aestivum L.) cultivars, Xihan1 (XH), Longzhong1 (LZ) and Dingfeng16 (DF). Principle component analysis illustrated that Factor 1, representing growth performance, soluble sugar content and catalase activity, responded to the Cd treatments in a dose dependent manner, while Factor 2 represented by chlorophyll content and germinating root growth was mainly dependent on cultivar differences. Higher inhibition rates were observed in growth performance than in physiological responses, with the highest inhibition rates of shoot biomasses (39.6%), root length (58.7%), root tip number (57.8%) and bifurcation number (83.2%), even under the lowest Cd treatment (2.5 mg·L−1). According to the Cd toxicity sensitivity evaluation, DF exerted highest tolerance to Cd stress in root growth while LZ was more sensitive to Cd stress, suggesting LZ as an ideal Cd contaminant biomarker. This study will provide novel insight into the cultivar-dependent response during using wheat seedlings as Cd biomarkers.Keywords
Funding Information
- National Water Pollution Control and Governance of Science and Technology Major Special (2009 ZX07528-001)
- Zhang-Hongda Science Foundation of Sun Yat-sen University
This publication has 47 references indexed in Scilit:
- The ER luminal binding protein (BiP) alleviates Cd2+-induced programmed cell death through endoplasmic reticulum stress–cell death signaling pathway in tobacco cellsJournal of Plant Physiology, 2013
- Cadmium interferes with maintenance of auxin homeostasis in Arabidopsis seedlingsJournal of Plant Physiology, 2013
- Enhanced lipoxygenase activity is involved in the stress response but not in the harmful lipid peroxidation and cell death of short-term cadmium-treated barley root tipJournal of Plant Physiology, 2013
- Hydrogen Peroxide‐Mediated Growth of the Root System Occurs via Auxin Signaling Modification and Variations in the Expression of Cell‐Cycle Genes in Rice Seedlings Exposed to Cadmium StressJournal of Integrative Plant Biology, 2012
- Impact of the auxin signaling inhibitor p-chlorophenoxyisobutyric acid on short-term Cd-induced hydrogen peroxide production and growth response in barley root tipJournal of Plant Physiology, 2012
- Nitric oxide implication in cadmium-induced programmed cell death in roots and signaling response of yellow lupine plantsPlant Physiology and Biochemistry, 2012
- Cadmium interferes with auxin physiology and lignification in poplarJournal of Experimental Botany, 2011
- Superoxide radical and auxin are implicated in redistribution of root growth and the expression of auxin and cell-cycle genes in cadmium-stressed riceRussian Journal of Plant Physiology, 2011
- Root responses to cadmium in the rhizosphere: a reviewJournal of Experimental Botany, 2010
- Effect of heavy metals on root growth and peroxidase activity in barley root tipActa Physiologiae Plantarum, 2009